Feasibility Analysis of Filling Subgrade with Waste Mud Cake in Sand Yard
Based on the waste mud cake produced by mechanical sand and gravel mining and processing in a certain place in Ningbo,through particle analysis test,limit water content test,X-ray diffraction test,chemical analysis test,compaction test,unconfined compressive strength test and load ratio test,the soil sample type of mud cake is determined and its mechanical properties are tested,and whether the waste mud cake is suitable for subgrade filling is discussed.The test results show that the particle group of mud cake soil sample is divided into fine particle group,and the engineering classification of soil sample should belong to low liquid limit silty clay;the particle group composition and limit water content are between silt and clay.The optimum moisture content is 20.6％,so drainage should be paid attention to in the construction of subgrade engineering to avoid the strength decline caused by a large amount of water flowing into soil foundation;The California bearing ratio(CBR)of mud cake soil samples mixed with 3.0％cement is large,which meets the requirements of the code and can be used for subgrade filling.
万方数据
维普
